Soap film flowmeter

Details Soap film flowmeter Soap film flowmeter

1987-02-13

1989-11-14

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring transit time of tracer or tag

G01F 1708

Patent

active

048799076

ABSTRACT:
A soap film type gas flowmeter has an inverted U-shaped gas flow tube adjustably mounted in a sensor assembly. The inverted attitude of the gas flow tube prevents backflow of the soap film solution down to the sensor assembly and prevents diffusion of a heavier gas than the gas whose flow is being measured into the gas flow tube, thereby eliminating diffusion of a lighter gas through the soap film during measurement. The adjustable mounting of the gas flow tube enables optimum operation of the flowmeter for widely ranging gas flow rates. The glass flow tube is made from mandrel drawn glass to ensure high accuracy, which allows interchangeability from flowmeter to flowmeter with no change in accuracy.

REFERENCES:
patent: 3248941 (1966-05-01), McArthur
patent: 3277707 (1966-10-01), Rodel
patent: 3308660 (1967-03-01), Ford
patent: 3323362 (1967-06-01), Wells
patent: 3403555 (1968-10-01), Versaci et al.
patent: 3592057 (1971-07-01), Boe et al.
patent: 3693436 (1972-09-01), Gildner
patent: 3815414 (1974-06-01), Hellstrom
patent: 4691577 (1987-09-01), Lalin et al.
patent: 4762004 (1988-08-01), Lalin et al.
"An Improved Design for Soap--Bubble Flow Meters" by LaHue et al., Dec. 1973.
"An Automatic Recording Bubble Flowmeter" by Nash et al., Dec. 1976.

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